Abstract
AbstractTetraamido‐oxacalix[4]arene derivatives have been synthesized via the reactions of tetraamino‐oxacalix[4]arene with excess butyryl chloride, octanoyl chloride, benzoyl chloride and p‐toluenesulfonyl chloride, respectively. 1H NMR results suggest that these oxacalix[4]arene derivatives preferentially adopt the 1,3‐alternate (saddle‐like) conformation in solution, which were also the case in the solid state as demonstrated by single crystal X‐ray analysis. A dimerized slipped capsule could be formed by tetra‐butyramido‐oxacalix[4]arene in the solid state via intermolecular hydrogen bond interactions under the assistance of two encapsulated methanol molecules. On the other hand, a molecular cavity was formed by tetra‐p‐toluenesulfonamido‐oxacalix[4]arene which can encapsulate a solvent molecule of ethyl acetate.
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